In this paper I argue that, yes, science, technology, and engineering are now the most important subjects for ethics to study. Due to the dramatic expansion of human power brought about by science, technology, and engineering, ethics needs to re-evaluate how humans should act given our new power. But it is not only ethics that needs to study science, technology and engineering - likewise, scientists, technologists, and engineers need to study ethics with great diligence, and embody ethical behavior in their lives, as befits many professional engineering societies' goals of holding paramount the “health, safety, and welfare” of the public.